Provided by: libstdc++-13-doc_13.3.0-13ubuntu1_all 

NAME
std::experimental::nullopt_t - Tag type to disengage optional objects.
SYNOPSIS
#include <optional>
Public Types
enum class _Construct { _Token }
Public Member Functions
constexpr nullopt_t (_Construct)
Detailed Description
Tag type to disengage optional objects.
Author
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libstdc++ std::experimental::nullopt_t(3cxx)